Production of optically active triazole compounds and their intermediates

Abstract

A compound of the formula (V): ##STR1## wherein Ar' is a halogenated phenyl group, R is a hydrocarbon residue having a functional group at the α-carbon, R 3' is an optionally substituted aliphatic or aromatic hydrocarbon residue or an optionally substituted aromatic heterocyclic group, Y and Z are, the same or different, a nitrogen atom or a methine group optionally substituted with a lower alkyl group, and (R) and (S) represent configurations, which is an optically active intermediate for production of optically active triazole compounds (I): ##STR2## wherein the symbols have the same meanings as defined above, and methods of preparing the compounds (V) and (I).

What we claimed is: 
     
       1. A compound of the formula (V): ##STR80## wherein Ar' is a halogenated phenyl group, R is a hydrocarbon residue having at the α-carbon, a functional group selected from the group consisting of a silyl group, a double bond, and an optionally activated hydroxyl group, R 3'  is an optionally substituted aliphatic or aromatic hydrocarbon residue or an optionally substituted aromatic heterocyclic group, Y and Z are, the same or different, a nitrogen atom or a methine group optionally substituted with a lower alkyl group, and (R) and (S) represent configurations. 
     
     
       2. The compound according to claim 1, in which the functional group in R of the formula (V) is a silyl group. 
     
     
       3. The compound according to claim 1, in which the functional group in R of the formula (V) is a double bond. 
     
     
       4. The compound according to claim 1, in which the functional group in R of the formula (V) is an optionally activated hydroxyl group. 
     
     
       5. The compound according to claim 1, in which R of the formula (V) is a methylene group having a functional group selected from the group consisting of a silyl group and an optionally activated hydroxyl group. 
     
     
       6. The compound according to claim 1, in which R of the formula (V) is a methine group having a double bond. 
     
     
       7. The compound according to claim 1, in which R of the formula (V) is a group represented by the formula: ##STR81## wherein R', R" and R'" are, the same or different, a lower alkyl group or a lower alkoxy group. 
     
     
       8. The compound according to claim 1, in which R of the formula (V) is H 2  C═CH--. 
     
     
       9. The compound according to claim 1, in which R of the formula (V) is HO--CH 2  --. 
     
     
       10. The compound according to claim 1, in which R of the formula (V) is a group represented by R 5  SO 3  --CH 2  -- wherein R 5  is a lower alkyl group or an optionally substituted phenyl group. 
     
     
       11. The compound according to claim 1, in which Ar' of the formula (V) is a phenyl group substituted with one or two fluorine atoms. 
     
     
       12. The compound according to claim 1, in which Ar' of the formula (V) is 2,4-difluorophenyl or 2-fluorophenyl. 
     
     
       13. The compound according to claim 1, in which R 3'  of the formula (V) is a phenyl group substituted with a halogeno-alkoxy group. 
     
     
       14. The compound according to claim 1, in which R 3'  of the formula (V) is 4-(2,2,3,3-tetrafluoropropoxy)phenyl or 4-(1,1,2,2-tetrafluoroethoxy)phenyl. 
     
     
       15. The compound according to claim 1, in which Y and Z of the formula (V) are, the same or different, a nitrogen atom or a methine group. 
     
     
       16. A method of preparing the compound of the formula (V) of claim 1: which comprises reacting a compound of the formula (II): ##STR82## wherein the symbols have the same meanings as defined above, with a Grignard reagent of the formula (XXXI):     R--MgX                                                     (XXXI),     wherein X is a halogen atom and R has the same meaning as defined above.   
     
     
       17. The method according to claim 16, in which the Grignard reagent is a compound of the formula (XI): ##STR83## wherein R', R" and R'" are, the same or different, a lower alkyl group or a lower alkoxy group and X 2  is a halogen atom. 
     
     
       18. The method according to claim 17, in which R' and R" of the formula (XI) are methyl groups and R'" of the formula (XI) is (CH 3 ) 2  CHO--. 
     
     
       19. The method according to claim 16, in which the Grignard reagent is a compound of the formula (XII):   H.sub.2 C═CH--MgX.sup.3                                (XII),     wherein X 3  is a halogen atom.   
     
     
       20. The method according to claim 17, in which the compound of the formula (V) is oxidized to give a compound of the formula (V'): ##STR84## wherein Ar' is a halogenated phenyl group, R 3'  is an optionally substituted aliphatic or aromatic hydrocarbon residue or an optionally substituted aromatic heterocyclic group, Y and Z are, the same or different, a nitrogen atom or a methine group optionally substituted with a lower alkyl group, and (R) and (S) represent configurations, and then the obtained compound of the formula (V'), after activating a hydroxyl group upon necessity, is reacted with 1H-1,2,4-triazole or a salt thereof to give a compound of the formula (I): ##STR85## wherein the symbols have the same meanings as defined above, or a salt thereof. 
     
     
       21. The method according to claim 20, in which the compound of the formula (V) is oxidized using an aqueous solution of hydrogen peroxide as an oxidizing agent. 
     
     
       22. The method according to claim 20, in which the compound of the formula (V) is oxidized in the presence of a base. 
     
     
       23. The method according to claim 20, in which the hydroxyl group is activated using, as an activating agent, a compound of the formula (XIII):   R.sup.5 SO.sub.2 X.sup.4                                   (XIII),     wherein R 5  is a lower alkyl group or an optionally substituted phenyl group, and X 4  is a halogen atom or a group represented by R 5  SO 3  -- wherein R 5  has the same meaning as defined above.   
     
     
       24. A compound of the formula (Va'): ##STR86## wherein Ar' is a halogenated phenyl group, R is a hydrocarbon residue having at the α-carbon, a functional group selected from the group consisting of a silyl group, a double bond, and an optionally activated hydroxyl group, R 3'  is an optionally substituted aliphatic or aromatic hydrocarbon residue or an optionally substituted aromatic heterocyclic group, and (R) and (S) represent configurations. 
     
     
       25. The compound according to claim 24, in which R of the formula (Va') is HO--CH 2  --. 
     
     
       26. The compound according to claim 24, in which R of the formula (Va') is a group represented by R 5  SO 3  --CH 2  -- wherein R 5  is a lower alkyl group or an optionally substituted phenyl group. 
     
     
       27. The compound according to claim 24, in which Ar' of the formula (Va') is a phenyl group substituted with one or two fluorine atoms. 
     
     
       28. The compound according to claim 24, in which Ar' of the formula (Va') is 2,4-difluorophenyl or 2-fluorophenyl. 
     
     
       29. The compound according to claim 24, in which R 3'  of the formula (Va') is a phenyl group substituted with a halogenoalkoxy group. 
     
     
       30. The compound according to claim 24, in which R 3'  of the formula (Va') is 4-(2,2,3,3-tetrafluoropropoxy)phenyl or 4-(1,1,2,2-tetrafluoroethoxy)phenyl. 
     
     
       31. A method of preparing a compound of the formula (Va') of claim 24: which comprises reducing a compound of the formula (Va): ##STR87## wherein the symbols have the same meanings as defined above.   
     
     
       32. The compound according to claim 1, wherein R is a methine group having a functional group of R is selected from the group consisting of a silyl group, a double bond, and an optionally activated hydroxyl group.